湖南洞庭湖地区红土的元素地球化学特征及其指示意义

Element geochemistry of laterite in the Dongting Lake area,Hunan,China and its indicative significance

红土作为一种热带、亚热带地区广泛分布的松散岩类,其蕴含的气候环境变化信息和养分状况使得对其研究具有重要的理论和实际意义。在对洞庭湖区红土地层年代学研究的基础上,详细讨论了红土中元素的分布特征及控制因素,认为第四纪红土的地球化学特征反映了区域气候环境、流域物源特征和红土化作用强度的变化,对生态地球化学环境恢复有重要意义。

Laterite is one kind of loose sediments distributed widely in the tropic and subtropic areas. Its study has great theoretical and practical significance as it involves information of climatic and environmental changes and nutrient conditions. This paper discusses in detail the distribution characteristics and controlling factors of elements in laterite of the Dongting Lake area on the basis of the chronological study of laterite strata. It is concluded that the geochemical characteristics of Quaternary laterite reflect the regional climatic conditions, material source characteristics of the drainage area and change in intensity of lateritization. All the above information is of great scientific significance for the rehabilitation of the ecogeochemical environment.